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Analog Devices Inc./Maxim Integrated DS1813R-15/T&R
- Part No.:
- DS1813R-15/T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DS1813R-15/T&R.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,955
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Product details
Overview
DS1813R-15/T&R from Maxim Integrated is a precision voltage-monitoring reset IC with pushbutton reset capability, designed for microprocessor supervision in 5V systems. It features a 4.13V typical VCC trip point (±15% tolerance), 150ms reset timeout, open-drain RST output with internal 5.5kΩ pullup, and operates from -40°C to +85°C in SOT-23 package.
For engineers reviewing the DS1813R-15/T&R datasheet, DS1813R-15/T&R pinout, DS1813R-15/T&R application, or DS1813R-15/T&R equivalent, key selection criteria include reset threshold accuracy, pushbutton debounce timing, supply current (<40µA), operating temperature range, and compatibility with 5V microcontroller reset inputs requiring active-low open-drain assertion.
Technical Context
The DS1813R-15/T&R implements dual-reset supervision: power-fail detection via a precision temperature-compensated voltage reference and comparator, plus manual reset initiation through external pushbutton monitoring on the RST pin. Its internal circuitry asserts RST low upon VCC drop below 4.00–4.24V or upon release of a >1µs button press.
Reset assertion is sustained for 100–300ms (typ. 150ms) after both power-up recovery and pushbutton release, ensuring stable processor initialization. The open-drain output with integrated 3.5–7.5kΩ pullup eliminates need for external biasing while supporting standard microcontroller reset input logic levels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 4.00–4.24V (±15% tolerance); ensures reliable reset activation before 5V rail collapse affects CPU operation |
| Reset Timeout | 100–300ms (typ. 150ms); guarantees sufficient stabilization time for power supply and microprocessor post-recovery |
| Supply Current | 30–40µA at VCC < 5.5V; enables ultra-low-power system supervision without burdening standby current budgets |
| Output Type | Open-drain RST with internal 3.5–7.5kΩ pullup; simplifies interface to diverse MCU reset pins without external resistor |
| Operating Temp | -40°C to +85°C; supports industrial-grade embedded applications including automotive body control modules |
| Pushbutton Detect | Validates >1µs low pulse on RST; enables robust manual reset initiation even with contact bounce |
| VCC Slew Rate | 300µs for VCCTP transition; accommodates gradual power ramp-up/down without false triggering |
Pinout & Package
SOT-23 surface-mount package (3-pin, 1.3mm × 2.9mm footprint), RoHS-compliant, suitable for automated PCB assembly and space-constrained designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RST) | Active-Low Reset Output | Open-drain output asserted low during power fault or pushbutton release; requires external pullup only if load exceeds internal 5.5kΩ capability |
| 2 (VCC) | Power Supply Input | Monitored 1.2–5.5V supply rail; trip threshold fixed at 4.13V ±15%; absolute max 7.0V |
| 3 (GND) | Ground Reference | Common return path for voltage reference, comparator, and output stage; must be low-impedance for accurate threshold sensing |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Voltage Reference | Precision temperature-compensated bandgap reference enables stable 4.13V trip point across -40°C to +85°C |
| Pushbutton Supervision | Detects >1µs low pulse on RST pin and holds reset active for 150ms post-release-no external debouncing required |
| Low Quiescent Current | 30–40µA supply current allows continuous monitoring in battery-backed or energy-sensitive systems |
| Internal Pullup Resistor | 5.5kΩ nominal pullup eliminates discrete component while maintaining compatible VOH for 5V CMOS reset inputs |
| Wide Supply Range | Operates from 1.2V to 5.5V VCC, supporting legacy 5V and modern low-voltage microcontrollers |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Power interruption during CAN bus communication causes microcontroller lockup. IC Role / Device Role / Timing Role: DS1813R-15/T&R monitors 5V supply and asserts active-low reset within 5µs of undervoltage, then holds for 150ms to ensure clean restart. Use Value: Prevents firmware corruption by guaranteeing full processor reset before reinitializing CAN peripherals and I/O drivers. | Use Scenario: Cold-cranking voltage dip below 4.5V triggers unintended ECU behavior in door module. IC Role / Device Role / Timing Role: DS1813R-15/T&R detects VCC drop to 4.00V and forces reset; maintains RST low for 150ms after recovery to stabilize LIN transceiver and window motor drivers. Use Value: Eliminates need for external RC network and reduces BOM count by integrating precision threshold and timing. |
| Smart Energy Meter | Point-of-Sale Terminal |
Use Scenario: Mains dropout causes partial EEPROM write failure during tariff update. IC Role / Device Role / Timing Role: DS1813R-15/T&R senses VCC falling below 4.13V and initiates hardware reset before brownout corrupts flash memory operations. Use Value: Ensures atomic firmware updates and data integrity via deterministic reset timing aligned to power rail recovery. | Use Scenario: Operator-initiated hard reset required after touchscreen freeze without removing power. IC Role / Device Role / Timing Role: DS1813R-15/T&R monitors RST pin for pushbutton press; asserts reset for 150ms after release to fully reboot ARM Cortex-M4 application processor. Use Value: Provides user-accessible, bounce-immune reset path independent of software watchdog state. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-monitoring reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809R | Fixed 4.63V reset threshold (±2.5%), no pushbutton monitoring, 140ms reset timeout | Lacks manual reset capability; suited for pure power-supply supervision without user intervention | Select when only VCC monitoring is needed and higher trip point improves noise margin |
| TPS3808G15 | Adjustable threshold (0.4–5.8V), 200ms reset timeout, 1.4µA quiescent current, no integrated pushbutton detect | Requires external resistor divider and debouncing circuit; optimized for ultra-low-power battery systems | Select when flexible threshold tuning or sub-µA sleep current outweighs integration benefits |
Compared with MAX809R and TPS3808G15, the DS1813R-15/T&R uniquely combines fixed ±15% 4.13V threshold, built-in pushbutton supervision, and integrated pullup in SOT-23-reducing component count where manual reset and cost-sensitive 5V supervision are required.
Availability
DS1813R-15/T&R is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, smart metering, and point-of-sale terminal designs requiring stable component supply and long-term production continuity.
Supply support for DS1813R-15/T&R includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.
The DS1813R-15/T&R belongs to Maxim's EconoReset family-engineered for cost-effective, single-chip microprocessor supervision in 5V systems with minimal external components.
FAQ
What is the exact reset threshold voltage for DS1813R-15/T&R?
The DS1813R-15/T&R has a guaranteed VCC trip point of 4.00V (min), 4.13V (typ), and 4.24V (max), corresponding to ±15% tolerance around the nominal 4.13V threshold. This specification is validated across -40°C to +85°C and defines the voltage at which the DS1813R-15/T&R asserts its active-low RST output during power-down conditions.
Does DS1813R-15/T&R require an external pullup resistor on the RST pin?
No, the DS1813R-15/T&R integrates a 3.5–7.5kΩ internal pullup resistor on its open-drain RST output. An external pullup is unnecessary unless the connected microcontroller's input leakage or capacitive load exceeds the internal resistor's drive capability-verified per application conditions in the DS1813R-15/T&R datasheet.
How does DS1813R-15/T&R handle pushbutton reset timing?
The DS1813R-15/T&R detects any low pulse ≥1µs on the RST pin and responds by holding RST active low for 100–300ms (typically 150ms) after the button is released. This built-in timing eliminates external RC networks and ensures consistent reset duration regardless of switch bounce or operator press duration.
What is the maximum supply voltage rating for DS1813R-15/T&R?
The DS1813R-15/T&R has an absolute maximum VCC rating of +7.0V relative to GND. Operation above 5.5V is not recommended; the device is specified for DC operating conditions up to 5.5V, with functional performance guaranteed only within the 1.2V–5.5V range per its recommended operating conditions.
Is DS1813R-15/T&R compatible with 3.3V microcontrollers?
Yes, the DS1813R-15/T&R operates with VCC from 1.2V to 5.5V and its RST output is open-drain, allowing direct interface to 3.3V systems using an external pullup to 3.3V. The internal 5.5kΩ pullup is referenced to VCC, so for 3.3V operation, an external pullup ensures correct VOH level at the MCU reset input.
DS1813R-15/T&R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- EconoReset
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.13V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
DS1813R-15/T&R FAQ
1.How can I place an order for DS1813R-15/T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1813R-15/T&R on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DS1813R-15/T&R reliable?
The price and inventory of DS1813R-15/T&R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1813R-15/T&R is usually 5 days.
3.What payment methods are accepted for DS1813R-15/T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1813R-15/T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1813R-15/T&R?
DS1813R-15/T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1813R-15/T&R order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DS1813R-15/T&R?
For technical support, including DS1813R-15/T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1813R-15/T&R requirements.
6.How does Aetrix verify that DS1813R-15/T&R is sourced from the original manufacturer or authorized distributors?
All DS1813R-15/T&R products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DS1813R-15/T&R meets industry standards.
7.What is the process for return or replacement of DS1813R-15/T&R?
All DS1813R-15/T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1813R-15/T&R, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DS1813R-15/T&R part is unused and in its original packaging.
Return procedure for DS1813R-15/T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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